SRAM 64k x 4

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Cross-Reference
BRAND TAG NUMBER MARKINGS
Cypress CY7 194 CY7C192 CY7C194 CY7C195 CY7C196 CY7C67081 CY7C67082
Fujitsu MB 8184 MB81C84A MB81C86
Hitachi HM 6208 HM6208 HM6709 HM6709AJP HM6709SHJP
IDT IDT 71258 IDT71258 IDT61258 IDT71281S IDT71281L IDT71282S IDT71282L
Mitsubishi M5M 5259 M5M5259B
Motorola MCM 6209 MCM6209C
NEC uPD 3254 uPD43254CR
Samsung KM 41464 KM64257A KM64257AL KM64257B KM64258B KM64259B KM64260B
Sony CXK 54256 CXK54256
Toshiba TC 55464 TC55464 TC55465

Static Random-Access Memory 64K x 4 (DIP24, 300mil)(DIP28, 300mil)(SOJ24, 300mil)(SOJ28, 300mil)

Size

bit Byte (padded 0000xxxx) Byte (unpadded) Hex
256Kb 64KB 32KB 40000hex

Pinout

DIP24 - SOJ24
         +---\/---+
      A6 | 1    24| Vcc
      A7 | 2    23| A5
      A8 | 3    22| A4
      A9 | 4    21| A3
     A10 | 5    20| A2
     A11 | 6    19| A1
     A12 | 7    18| A0
     A13 | 8    17| I/O3
     A14 | 9    16| I/O2
     A15 |10    15| I/O1
     *CE |11    14| I/O0
     GND |12    13| *WE
         +--------+

DIP28 - SOJ28
         +---\/---+
      NC | 1    28| Vcc
      A6 | 2    27| A5
      A7 | 3    26| A4
      A8 | 4    25| A3
      A9 | 5    24| A2
     A10 | 6    23| A1
     A11 | 7    22| A0
     A12 | 8    21| NC
     A13 | 9    20| *CE2/NC
     A14 |10    19| I/O3
     A15 |11    18| I/O2
    *CE1 |12    17| I/O1
     *OE |13    16| I/O0
     GND |14    15| *WE
         +--------+

External links

SRAM page on wikipedia

Files